summaryrefslogtreecommitdiffstats
path: root/libFDK/include/FDK_trigFcts.h
diff options
context:
space:
mode:
Diffstat (limited to 'libFDK/include/FDK_trigFcts.h')
-rw-r--r--libFDK/include/FDK_trigFcts.h229
1 files changed, 0 insertions, 229 deletions
diff --git a/libFDK/include/FDK_trigFcts.h b/libFDK/include/FDK_trigFcts.h
deleted file mode 100644
index c32c0f2..0000000
--- a/libFDK/include/FDK_trigFcts.h
+++ /dev/null
@@ -1,229 +0,0 @@
-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- All rights reserved.
-
- 1. INTRODUCTION
-The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
-the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
-This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
-
-AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
-audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
-independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
-of the MPEG specifications.
-
-Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
-may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
-individually for the purpose of encoding or decoding bit streams in products that are compliant with
-the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
-these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
-software may already be covered under those patent licenses when it is used for those licensed purposes only.
-
-Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
-are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
-applications information and documentation.
-
-2. COPYRIGHT LICENSE
-
-Redistribution and use in source and binary forms, with or without modification, are permitted without
-payment of copyright license fees provided that you satisfy the following conditions:
-
-You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
-your modifications thereto in source code form.
-
-You must retain the complete text of this software license in the documentation and/or other materials
-provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
-You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
-modifications thereto to recipients of copies in binary form.
-
-The name of Fraunhofer may not be used to endorse or promote products derived from this library without
-prior written permission.
-
-You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
-software or your modifications thereto.
-
-Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
-and the date of any change. For modified versions of the FDK AAC Codec, the term
-"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
-"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
-
-3. NO PATENT LICENSE
-
-NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
-ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
-respect to this software.
-
-You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
-by appropriate patent licenses.
-
-4. DISCLAIMER
-
-This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
-"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
-of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
-CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
-including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
-or business interruption, however caused and on any theory of liability, whether in contract, strict
-liability, or tort (including negligence), arising in any way out of the use of this software, even if
-advised of the possibility of such damage.
-
-5. CONTACT INFORMATION
-
-Fraunhofer Institute for Integrated Circuits IIS
-Attention: Audio and Multimedia Departments - FDK AAC LL
-Am Wolfsmantel 33
-91058 Erlangen, Germany
-
-www.iis.fraunhofer.de/amm
-amm-info@iis.fraunhofer.de
------------------------------------------------------------------------------------------------------------ */
-
-/*************************** Fraunhofer IIS FDK Tools **********************
-
- Author(s): Haricharan Lakshman, Manuel Jander
- Description: Trigonometric functions fixed point fractional implementation.
-
-******************************************************************************/
-
-
-
-#include "common_fix.h"
-
-#include "FDK_tools_rom.h"
-
-/* Fixed point precision definitions */
-#define Q(format) ((FIXP_DBL)(((LONG)1) << (format)))
-
-#ifndef M_PI
-#define M_PI (3.14159265358979323846f)
-#endif
-
-/*!
- * Inverse tangent function.
- */
-
-// --- fixp_atan() ----
-#define Q_ATANINP (25) // Input in q25, Output in q30
-#define Q_ATANOUT (30)
-#define ATI_SF ((DFRACT_BITS-1)-Q_ATANINP) // 6
-#define ATI_SCALE ((float)(1<<ATI_SF)) //
-#define ATO_SF ((DFRACT_BITS-1)-Q_ATANOUT) // 1 ] -pi/2 .. pi/2 [
-#define ATO_SCALE ((float)(1<<ATO_SF)) //
-// --- fixp_atan2() ---
-#define Q_ATAN2OUT (29)
-#define AT2O_SF ((DFRACT_BITS-1)-Q_ATAN2OUT) // 2 ] -pi .. pi ]
-#define AT2O_SCALE ((float)(1<<AT2O_SF)) //
-// --------------------
-
-FIXP_DBL fixp_atan(FIXP_DBL x);
-FIXP_DBL fixp_atan2(FIXP_DBL y, FIXP_DBL x);
-
-FIXP_DBL fixp_cos(FIXP_DBL x, int scale);
-FIXP_DBL fixp_sin(FIXP_DBL x, int scale);
-
-#define FIXP_COS_SIN
-
-
-#include "FDK_tools_rom.h"
-
-#define SINETAB SineTable512
-#define LD 9
-
-
-#ifndef FUNCTION_inline_fixp_cos_sin
-
-#define FUNCTION_inline_fixp_cos_sin
-
-/*
- * Calculates coarse lookup index and sign for sine.
- * Returns delta x residual.
- */
-static inline FIXP_DBL fixp_sin_cos_residual_inline(FIXP_DBL x, int scale, FIXP_DBL *sine, FIXP_DBL *cosine)
-{
- FIXP_DBL residual;
- int s;
- int shift = (31-scale-LD-1);
- int ssign = 1;
- int csign = 1;
-
- residual = fMult(x, FL2FXCONST_DBL(1.0/M_PI));
- s = ((LONG)residual) >> shift;
-
- residual &= ( (1<<shift) - 1 );
- residual = fMult(residual, FL2FXCONST_DBL(M_PI/4.0)) << 2;
- residual <<= scale;
-
- /* Sine sign symmetry */
- if (s & ((1<<LD)<<1) ) {
- ssign = -ssign;
- }
- /* Cosine sign symmetry */
- if ( (s + (1<<LD)) & ((1<<LD)<<1) ) {
- csign = -csign;
- }
-
- s = fAbs(s);
-
- s &= (((1<<LD)<<1)-1); /* Modulo PI */
-
- if (s > (1<<LD)) {
- s = ((1<<LD)<<1) - s;
- }
-
- {
- LONG sl, cl;
- /* Because of packed table */
- if (s > (1<<(LD-1))) {
- FIXP_STP tmp;
- /* Cosine/Sine simetry for angles greater than PI/4 */
- s = (1<<LD)-s;
- tmp = SINETAB[s];
- sl = (LONG)tmp.v.re;
- cl = (LONG)tmp.v.im;
- } else {
- FIXP_STP tmp;
- tmp = SINETAB[s];
- sl = (LONG)tmp.v.im;
- cl = (LONG)tmp.v.re;
- }
-
-#ifdef SINETABLE_16BIT
- *sine = (FIXP_DBL)((sl * ssign) << (DFRACT_BITS-FRACT_BITS));
- *cosine = (FIXP_DBL)((cl * csign) << (DFRACT_BITS-FRACT_BITS));
-#else
- *sine = (FIXP_DBL)(sl * ssign);
- *cosine = (FIXP_DBL)(cl * csign);
-#endif
- }
-
- return residual;
-}
-
-/**
- * \brief Calculate cosine and sine value each of 2 angles different angle values.
- * \param x1 first angle value
- * \param x2 second angle value
- * \param scale exponent of x1 and x2
- * \param out pointer to 4 FIXP_DBL locations, were the values cos(x1), sin(x1), cos(x2), sin(x2)
- * will be stored into.
- */
-static inline void inline_fixp_cos_sin (FIXP_DBL x1, FIXP_DBL x2, const int scale, FIXP_DBL *out)
-{
- FIXP_DBL residual, error0, error1, sine, cosine;
- residual = fixp_sin_cos_residual_inline(x1, scale, &sine, &cosine);
- error0 = fMultDiv2(sine, residual);
- error1 = fMultDiv2(cosine, residual);
- *out++ = cosine - (error0<<1);
- *out++ = sine + (error1<<1);
-
- residual = fixp_sin_cos_residual_inline(x2, scale, &sine, &cosine);
- error0 = fMultDiv2(sine, residual);
- error1 = fMultDiv2(cosine, residual);
- *out++ = cosine - (error0<<1);
- *out++ = sine + (error1<<1);
-}
-#endif
-